Answer:
A
Explanation:
You did not list the options. However, knowing the possible options from having seen the material myself - I can infer that the answer option is A. I apologize sincerely if this is wrong.
The maximum height at which the baseball will reach is given by the formula
<span>Vf^2 - Vo^2 = 2gh </span>
<span>where </span>
<span>Vf = final velocity = 0 (at its peak) </span>
<span>Vo = initial velocity = 22 m/sec (given) </span>
<span>g = acceleration due to gravity = 9.8 m/sec^2 (constant) </span>
<span>h = maximum height attained by the ball </span>
<span>Substituting appropriate values, </span>
<span>0 - (22)^2 = 9(-9.8)h </span>
<span>NOTE the negative sign attached to the acceleration due to gravity. This simply denotes that the ball is slowing down as it goes up. </span>
<span>Solving for "h", </span>
<span>h = 22^2/(2 * 9.8) </span>
<span>h = 24.69 meters </span>
<span>To solve for the time it reaches its maximum height, use the formula </span>
<span>h = VoT -(1/2)(gT^2) </span>
<span>where </span>
<span>T = time for ball to reach maximum height </span>
<span>and all the other terms have been previously defined. </span>
<span>Substituting values, </span>
<span>24.69 = 22T - (1/2)(9.8)T^2 </span>
<span>Rearranging the above, </span>
<span>4.9T^2 - 22T + 24.69 = 0 </span>
<span>Using the quadratic formula, </span>
<span>T = 2.22 seconds </span>
<span>NOTE --- the above is the time for the ball to reach its maximum height. The total time it is in the air is </span>
<span>Total time = 2(2.22) = 4.44 sec.
Hope this helps :) </span>
Answer:
a) 378Ns
b) 477.27N
Explanation:
Impulse is the defined as the product of the applied force and time taken. This is expressed according to the formula
I = Ft = m(v-u)
m is the mass = 70kg
v is the final velocity = 5.4m/s
u is the initial velocity = 0m/s
Get the impulse
I = m(v-u)
I = 70(5.4-0)
I = 70(5.4)
I = 378Ns
b) Average total force is expressed as
F = ma (Newton's second law)
F = m(v-u)/t
F = 378/0.792
F = 477.27N
Hence the average total force experienced by a 70.0-kg passenger in the car during the time the car accelerates is 477.27N
Answer:
Total distance = 6.5 km
Explanation:
Let the distance be denoted by the vectors drawn from A, B, C, D, E, and F.
Then the distance covered can be calculated by adding the vectors in the direction given.
Total distance = 3km + 1km+ 1.5km+ 0.5km+ 0.5km
Total distance = 6.5 km
If we were to find the displacement ( shortest distance) then the head to tail rule would be applied using the vectors.
They are related because they are all important elements in physical science. They all deal with motion and the movement of molecules ( also volume).
Please vote my answer brainliest. thanks!